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Karl Mayer's RDJ 5/1 machine sets trends in making shoes
Jan '17
Karl Mayer, Germany’s leading textile machinery company, has launched the RDJ 5/1 machine, setting new efficiency standards in multicoloured sports shoes. Sports and leisure shoes are the real trendsetters in the shoe sector with new materials and designs. The innovation cycles are largely influenced by double-bar raschel technology (DR technology).

These warp knitting machines with two needle bars produce spacer textiles that have become firm favourites for manufacturing the footwear worn by sports enthusiasts and fashion-conscious people alike. More and more designs are being produced, thanks to the use of piezo jacquard technology.

An RDJ 5/1 machine is the basis for this new trend. This machine operates in a gauge of E 24, and a needle gauge of E 22 is also available. It features a specific technical configuration and the distance between the trick plates is just 2 millimetre. The distance between the knock-over comb bars can generally be set at between 2 and 8 millimetre. The multicoloured threading arrangement is particularly remarkable. The jacquard bar is threaded with black yarn, whilst the ground guide bars process the red yarn for the inside of the fabric and also yellow and blue yarn for the outer side. This flexible warp preparation machine combines direct and sectional warping, and thus enables multicoloured sectional warp beams to be produced efficiently and in a wide range of colours.

To produce an attractive, brightly coloured shoe fabric, the multi-coloured sectional warp beams are processed by the ground guide bars on both sides of the fabric to produce a design having a dense construction. The jacquard bar places the black yarn to suit the lapping, and swings backwards and forwards between the needle bars in order to do this. The pattern is, therefore, based on a specific combination of colours and not, as previously, on the production of holes of varying sizes at different locations.

This flat, hardwearing, double-layered fabric not only has a modern look with a variety of different designs, it can also be produced extremely efficiently. At a speed of roughly 740 courses per minute and a working width of 138”, the RDJ 5/1 can produce the fabric for up to 150 pairs of shoes per hour – much more than can be produced by circular weft knitting machines, not to mention flat weft knitting machines. (GK)

Fibre2Fashion News Desk – India

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